| A H Painting | A H Painting | — | (714) 486 9680 | Windows, patio, painters | Corona · Riverside County | — | — |
| A Haven Builders INC | Robert James Quinn | — | (760) 578 5855 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| A Hurtado Paving | A Hurtado Paving | — | (951) 295 8517 | Other | Moreno Valley · Riverside County | — | — |
| A I Construction | Tashombe Vondez White | — | (951) 992 7316 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| A I E General Construction | Gutierrez Lugo Margarito | — | (805) 310 6465 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| A I M Electric | Bernardino Jr Arreola | — | (760) 578 1039 | Electricians | Indio · Riverside County | — | — |
| A I N Construction And Remodeling | Ramon Francisco Camarena | — | (760) 899 6164 | GC, remodel, ADU | Thermal · Riverside County | — | — |
| A J Concrete | A J Concrete | — | (951) 413 4929 | Other | Moreno Valley · Riverside County | — | — |
| A J Construction | Juan Carlos Mendez Herrera | — | (909) 520 3588 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| A J Contracting | Hesham Mohamed Hassan | — | (714) 343 6836 | GC, remodel, ADU | Eastvale · Riverside County | — | — |
| A J D General Contractor INC | Alaniz Adolfo Otero | — | (626) 201 0202 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| A J M Construction Services | Anthony James Moisio | ajm4construction@aol.com | (909) 917 6679 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| A J Painting Co | Jara Alberto | — | (951) 370 5886 | Windows, patio, painters | Hemet · Riverside County | — | — |
| A J Shower Pans | A J Shower Pans | — | (949) 306 5218 | Other | Riverside · Riverside County | — | — |
| A J Zimmer Construction INC | Stephen Ed Zimmer | — | (951) 357 2118 | Other | Temecula · Riverside County | — | — |
| A K Builders | A K Builders | — | (951) 813 0030 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| A K Construction | Andrew Andor Kolozsvari | — | (951) 845 9639 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| A K Landscaping Maintenance INC | Miguel Angel Arechiga | — | (760) 347 9747 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| A L D C O Air | Aldaz Rafael | — | (760) 564 9963 | HVAC | Indio · Riverside County | — | — |
| A L D E Fence | A L D E Fence | — | (951) 306 9385 | Other | Hemet · Riverside County | — | — |
| A M C Renovations INC | Michael Joseph Debari | — | (833) 262 7366 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| A M C Restoration | A M C Restoration | — | (951) 733 6689 | GC, remodel, ADU | Corona · Riverside County | — | — |
| A M C Septic Contractors INC | Rita Marie Creamer | — | (909) 721 2982 | Other | Corona · Riverside County | — | — |
| A M Custom Concrete & Design INC | Aurelio Ramirez Gonzalez | — | (951) 445 9224 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| A M Flooring Co | Mejia Alvaro | — | (951) 722 6146 | Other | Sun City · Riverside County | — | — |
| A M G Concrete INC | Guzman Adrian Mercado | — | (951) 575 0784 | Other | Perris · Riverside County | — | — |
| A M Kerbing | A M Kerbing | — | (951) 491 9824 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| A M Lopez Construction INC | Agustin Mauricio Lopez Lopez | lopezamconstruction@gmail.com | (951) 591 6500 | GC, remodel, ADU | Romoland · Riverside County | — | — |
| A M P Manufactured Home Specialist INC | Adrian Mitchell Padilla | — | (951) 313 8484 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| A M Plumbing | A M Plumbing | — | (951) 526 9315 | Other | Sun City · Riverside County | — | — |
| A M Plumbing & Rooter LLC | Timothy Alexander Martz | — | (951) 207 7379 | Other | Lake Elsinore · Riverside County | — | — |
| A M Premier Construction INC | Aguilar Avelino Mendez | — | (909) 489 7683 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| A M S Construction | Jeramie Wayne Jones | — | (833) 267 7663 | Other roofers | Riverside · Riverside County | — | — |
| A M S Drywall Specialists | A M S Drywall Specialists | — | (714) 742 3120 | Other | Corona · Riverside County | — | — |
| A Magic Tub Repair | A Magic Tub Repair | — | (562) 201 4309 | Other | Hemet · Riverside County | — | — |
| A Mendez Construction | Mendez Lechuga Avelino | — | (714) 650 3115 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| A N C Construction | Alfonso Jr Nava | — | (951) 347 3886 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| A N M Construction | Alfonso Burresch Iii Moscozo | csmith@anmconstruction.com | (951) 337 1445 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| A O Masonry INC | Oros-cuin Arnulfo | — | (760) 989 8500 | Other | Coachella · Riverside County | — | — |
| A O Torres Construction Co | Alejandro Ortiz| Torres Alex Torres | — | (760) 834 5870 | HVAC | Indio · Riverside County | — | — |